A new poll in Arkansas shows that most voters disagree with Sen. Mark Pryor about who's entitled to represent them next year.

The poll released Monday by the Democratic firm Hickman Analytics Inc. shows that 51 percent of voters surveyed would choose Republican Rep. Tom Cotton to only 42 percent for Pryor. The Feb. 17-20 poll of 400 likely voters had a margin of error of plus or minus 4.9 percentage points.

Pryor is widely seen as the most vulnerable incumbent this year, and he's trailed Cotton in polling since October. But this is the first poll in which Cotton has been able to pull in majority support.